Guy Boothby Books

A Bid for Fortune, or Dr.Nikola's Vendetta

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London, the decadent 1890s: a mysterious meeting is called in a private room of the sumptuous Imperial Hotel. The sinister Dr Nikola is presiding, but what masterpiece of crime is he planning? Mean...

Dr. Nikola Returns

By Guy Boothby

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Olikir erfingjar

By Guy Boothby

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Dr. Nikola's experiment

By Guy Boothby

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The Red Rat's daughter

By Guy Boothby

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Dr. Nikola's experiment

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My Strangest Case

By Guy Boothby

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My Strangest Case

By Guy Boothby

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Doctor Nikola

By Guy Boothby

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Enter Dr. Nikola!

By Guy Boothby

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.